github.com/lixvbnet/courtney@v0.0.0-20221025031132-0dcb02231211/tester/logger/logger_test.go (about)

     1  package logger
     2  
     3  import (
     4  	"bytes"
     5  	"testing"
     6  
     7  	"os"
     8  )
     9  
    10  func TestLogger(t *testing.T) {
    11  	_, o, e := Log(false, os.Stdout, os.Stderr)
    12  	_, ok := o.(*bytes.Buffer)
    13  	if !ok {
    14  		t.Fatal("Stdout is not a *Buffer")
    15  	}
    16  	_, ok = e.(*bytes.Buffer)
    17  	if !ok {
    18  		t.Fatal("Stderr is not a *Buffer")
    19  	}
    20  
    21  	_, o, e = Log(true, os.Stdout, os.Stderr)
    22  	_, ok = o.(*multiWriter)
    23  	if !ok {
    24  		t.Fatal("Stdout is not a *multiWriter")
    25  	}
    26  	_, ok = e.(*multiWriter)
    27  	if !ok {
    28  		t.Fatal("Stderr is not a *multiWriter")
    29  	}
    30  }
    31  
    32  func TestMultiWriter(t *testing.T) {
    33  	var p, w1, w2 []byte
    34  	pb := bytes.NewBuffer(p)
    35  	w1b := bytes.NewBuffer(w1)
    36  	w2b := bytes.NewBuffer(w2)
    37  	mw := MultiWriter(pb, w1b, w2b)
    38  	mw.Write([]byte("a"))
    39  	mw.Write([]byte("b"))
    40  	if pb.String() != "ab" {
    41  		t.Fatalf("pb expected 'ab', got '%s'", pb.String())
    42  	}
    43  	if w1b.String() != "ab" {
    44  		t.Fatalf("w1b expected 'ab', got '%s'", pb.String())
    45  	}
    46  	if w2b.String() != "ab" {
    47  		t.Fatalf("w2b expected 'ab', got '%s'", pb.String())
    48  	}
    49  }